Fix problematic double var lookup in xref/fn-refs+fn-deps

[plexus]

fn-deps already calls as-val which will resolve a var if it is given one, so
fn-refs does not need to call (map var-get) beforehand. Not doing this
presents issues when a var contains a symbol. This currently would result in the
symbol being treated as a var name, causing exceptions or incorrect results.

Closes #135

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• The commits are consistent with our contribution guidelines
• You've added tests to cover your change(s)
• All tests are passing
• The new code is not generating reflection warnings
• You've updated the changelog (if adding/changing user-visible functionality)

Thanks!

[vemv]

Excellent opportunity to increase test coverage 🙏 sometimes I'm finding our test suites give me bit of a false confidence

[plexus]

Be my guest!

[vemv]

Doesn't bother me 👍

Relatedly perhaps you can open PRs directly from a branch (vs. a fork)? That way one can push directly (which obviously would be only done when it's called for)

For next time, here I believe I'll post a .patch

[plexus]

Oh yeah sure, wasn't aware of the etiquette around that. Note that I have Allow edits by maintainers checked so you should be able to push to my branch I think.

[bbatsov]

@vemv What's the ETA for the tests? I'd like to wrap this up this week if possible.

[vemv]

Noted, will give it a shot soon